When you're out drinking and it's time for the clubs to close. The fluorescent lights (ugly lights)come on, and feverish attempts are made to hide oneself in the midst of their harsh white glow. You realise that the Hottie you have been making out with in a dark corner with is glaringly unattractive, but you realise even more so that after 8 hours of drinking, you look like utter shit- it's Ugly Hour.

Girl 1: You look like shit. What time did you make it home this morning?
Girl 2: Oh, when the club was about to close I decided I'd had enough...
Girl 1: You're were out till Ugly Hour?
Girl 2: Yes, and it was indeed very ugly...